* {
  box-sizing: border-box;
}

.calculator-container {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

ul {
  list-style-type: none;
  padding: 0;
}

.col {
  display: flex;
  flex-direction: column;
  align-items: center;
  border: solid rgb(80, 140, 163);
  background: rgb(242, 242, 255);
}

.row {
  display: flex;
}

.num {
  width: 50px;
  height: 50px;
}

.operator {
  width: 70px;
  height: 40px;
}

li {
  margin: 5px;
}

.result-container {
  margin: 0;
  padding: 7px 0;
  height: 50px;
  width: 100%;
  background: rgb(160, 181, 201);
  font-weight: 500;
  font-size: 30px;
  color: rgb(88, 21, 21);
}

.operator.execute {
  background: green;
  color: white;
  border: none;
}

.operator.clear {
  background: red;
  color: rgb(255, 229, 181);
  border: none;
}

.operator.backspace {
  background: rgb(255, 109, 56);
  color: rgb(255, 241, 216);
  border: none;
}